• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Yaw Rate Supply Voltage Circuit | C0196 00 | C0196 00 | C0196 00 | -- |
Yaw Rate CAN Bus High Circuit | C0196 00 | C0196 00 | C0196 00 | C0196 5A, 3B, 1A |
Yaw Rate CAN Bus Low Circuit | C0196 00 | C0196 00 | C0196 00 | C0196 5A, 3B, 1A |
Yaw Rate Ground Circuit | -- | C0196 00 | -- | -- |
The vehicle stability enhancement system (VSES) is activated by the electronic brake control module (EBCM) calculating the desired yaw rate and comparing it to the actual yaw rate input. The Yaw/Lateral sensor communicates to the EBCM on a dedicated CAN bus. The desired yaw rate is calculated from measured steering wheel position, vehicle speed, and lateral acceleration. The difference between the desired yaw rate and actual yaw rate is the yaw rate error, which is a measurement of over-steer or under-steer. If the yaw rate error becomes too large, the EBCM will attempt to correct the vehicle's yaw motion by applying differential braking to the wheels.
• | The ignition switch is in the ON position. |
• | The ignition voltage is greater than 9.5 volts. |
• | The yaw/lateral combination sensor reports an internal failure. |
• | The yaw/lateral combination sensor learns a wrong offset value |
• | Incorrectly mounted yaw/lateral sensor. |
One or more of the following actions may occur:
• | VSES are disabled. |
• | The VSES indicator illuminates. |
• | The driver information center (DIC) displays the Service ESC message. |
• | The condition for the DTC is no longer present. |
• | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Possible causes of this DTC are as follows:
• | Inspect the mounting of the Yaw sensor to ensure proper orientation and installation of the sensor. |
• | On a level surface, read the Yaw sensor offset value to ensure a value within the proper range. |
Antilock Brake System Schematics
Control Module References for Scan Tool Information
⇒ | If greater than the specified range, test for an open/high resistance in the low reference circuit . If the circuit tests normal, replace the EBCM. |
⇒ | If not the specified value, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM. |
⇒ | If greater than the specified value, test the low reference circuit for a short to ground. |
⇒ | If greater than the specified value, test the communication circuit for a short to voltage. |
⇒ | If greater than the specified value, test the communication circuit for a short to voltage. |
⇒ | If not the specified value, test the communication circuit for a short to ground. |
⇒ | If not the specified value, test the communication circuit for a short to ground. |
⇒ | If greater than the specified range, test the communication circuit for an open/high resistance. |
⇒ | If greater than the specified range, test the communication circuit for an open/high resistance. |
⇒ | If not the specified value, test the communication circuits for a short together. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for EBCM replacement, setup and programming |